Valveless engine



(No Model.) 7 2 Sheets-Sheet 1.

. A SOHEID.

VALVBLESS ENGINE.

No. 540,461. Patented June 4,1895.

ATTORNEYS UNITED STATES PATENT O FICE.

ADAM SCHEID, OF HARRISON, NEW JERSEY.

VALVELESS ENGINE.

SPECIFICATION forming part of Letters Patent No. 540,461, dated June 4,1895.

Application filed N v mber 15 1394. Serial No. 523,853. (No model.)

To all whom it may concern:

Be it known that I, ADAM SCHEID, a'citizen of the United States,residing in Harrison, Hudson county, and State of New Jersey, haveinvented certain new and useful Improvements in Valveless Engines; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

The object of this invention is to provide an engine for steam, gas, airor any other motive fluid, of simple, strong and durable construction,and which on account of its novel arrangement of parts does not requirea Valve for controlling the motive fluid inlet and exhaust respectively.7

The invention consists in the improve valveless engine, in its cylinder,piston and piston rod respectively, in the ports and channels arrangedin the said cylinder and piston, and in the combination and arrangementof parts, substantially as will be hereinafter more fully described andfinally embodied in the claim.

Referring to the accompanying drawings, in which like letters ofreference indicate corresponding parts in each of the several views,Figure 1 represents in a central sectional view the cylinder, piston,and pistonrod of my improved valveless engine. Fig. 2 is a similar viewillustrating a modified form of the same, and Fig. 3 a central sectionalView of a rock-drill provided with my im proved valveless cylinder andpiston.

In said drawings it represents the cylinder, 22 and b the cylinder headsand c and d the motive fluid inlet and exhaust respectively, arrangedabout midway on the cylinder and at opposite sides thereof. On each endof the cylinder a is arranged an enlargement or chamber 19 whereby alarge amount of steam can accumulate in the said ends.

In the construction illustrated in Fig. 1, the piston e is provided ator near each end with a circular groove 0 (o adapted to be alternatelybrought in communication with the motive fluid inlet 0. Said grooves 0and 0 are in communication with the opposite ends of the cylinder byports h and h penetrating the piston as shown in dotted lines. Theexhaust channels d and d are arranged on eachside of the fuel inlet 0and are connected with the exhaust d by means of the channel or port d.

In the construction illustrated in Fig. 2, the motive fluid inletcommunicates with the circular groove d arranged in the cylinder andabout midway between the exhaust channelsd' and (1 The circular grooves0 and o of the piston are done away with. and the channels 71. and hextend to and through the surface of the piston,as clearly shown in saidFig. 2. a

Providing my improved engineis a steam engine'the operation isthen asfollows: The steam enters through inlet 0 and port h of the piston intothe forward-end of the cylinder. The piston is thus forced backwarduntil it has. cleared the circular channel d when the steam isexhausted. Simultaneously the port h is brought into communication withthe steam inlet and the steam enters through said port into the rear endof the cylinder, thus forcing the piston forward until it has clearedthe annular channel d of the cylinder a, when the steam is againexhausted and the former described operation is repeated. As can beclearly seen from the drawings, the

ports h and h also act as exhaust ports, in

the backward and forward motion of the piston respectively, as theyconnect during the travel of the piston the rear and front end of thecylinder with the circular exhaust channels d and d respectively, thusallowing the remainder of the steam (should there be any),

to exhaust, before fresh steam is let into the cylinder.

In Fig. 3 a rock drill is illustrated, which is provided with myimproved device. The piston operates on'the drill rotating bar M,

.controlled by the rotating device R in the piston, all of said partsbeing arranged substantially as and for the purposes described.

In testimony that I claim the foregoing I have hereunto set my hand this3d day of November, 1894.

ADAM SCH EID.

Witnesses:

ALFRED GARTNER, DUNCAN M. ROBERTSON.

